Creasing press



April 7, 1931.

F. M. GREEN CREASING' PRESS Fil'ed Oct. 19, 1929 '2 Sheets-SheetATTORNEYS.

April 7, 1931. F. M GREEN 1799363 CREASING PRESS Filed Oct 19; 1329 2sheei s-sheet 2 IN V EN TOR.

A TTORNEYS.

Patented Apr. 7, 1931 CR-EAfiING rnnss Application filed Gctoher 19,1929. Serial No. 400,862.

The present invention relates to cutting and creasing presses of thetype used 1n the paper box industry and haspartlcular reference tocreasing presses having massive platen castings.

One object of the invention is to provide an improved shaft arrangementfor platens of this type.

Another object is to provide a quickly replaceable shaft structure.

A third object is to provide simplified bearing means for the powershaft.

Further objects and advantageous features will be readily apparent fromthe de tailed description following in conjunction with the accompanyingdrawings, and will be particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation of the improved press;

Figure 2is a perspective View of the platen base with the detachableshaft; mounted therein; and I Figure 3 is an enlarged sectional detailof the adjusting dog and the manually operated dog engaging mechanism.

Figure 4 is a perspective view of the platen shaft.

It is of advantage to provide a steel shaft for strengthening andbracing the massive platen castings and to eliminate costly breakdowndelays by detachably securing the steel shafts to the castings. It isalso of advantage 35 to provide a bearing arrangement-for the powershaft which permits ready removal of the power shaft fromits bearing; 1have devised a simple construction for accomplishing these desirableresults, and the following 40 is a detailed description of a preferredembodiment of the structural features of my invention.

Referring to the drawings: 10 designates a cutting and creasing press ofthe heavy duty- 45 type, having the usual press bed 11,

ner. Theplateni end of ea'chdraw bar 15 is mounted on an eccentric 19,bored to receive the draw pins 20 at the end of the platen shaft 21. YThis shaft'21, illustrated in perspective in 65 Figure 2 and Figure 4,is generally rectangular in form and fits within a recess or slot 23 cutwithin in the platen base 24, and extends the entire length of theplaten and protrudes beyond on each side. Bolts 25 or the like removablyretain the inserted shaft within the recess 23, the platen 26 beingsecured to the upper face of the base by bolts 27 or the like.

As shown in Figure 2, the platenbase' 24 has two arcuate-portions 28 forrolling on cooperating tracks 29 on the frame, links 30 beingrespectively pivoted on pins 31 fixed in standards secured to the press,and 011 pins 32 secured to or integral with the platen base25.

' The eccentrics 19 have laterally positioned levers or 'arms 33 which'may be shifted to vary the position of shaft draw pins 20 withrespectto the draw bars 15 and thus place the platen into operativeposition. Each shiftable lever 33 is tubular and has a trip 34 therein,movable into engagement with an adjustable dog35, for a purposehereinafter describedJ i v A coil spring36 is housed within the tubularlever33 and extendsinto acap 37 fitted on the end thereof. The trip '34has an eX- tension 38 passing through an opening in the cap 37, theextension being bifurcated and having a pivot pin 39 secured to thebifurcations thereof upon which a handle 40 is mounted; the handle 40has a cam shaped end 41, engageable with a bearing plate 42, positionedon the cap member, to manually move the trip, 34 against the pressure ofthe spring 36 and out of engagement with the adjustable. dog 35. Asshown in Figure 3,

the dog 35 is adjustably mounted over two adjacent toothed segments 43,abolt 44 hav-- ing its head 45 movably positioned within grooves formedin the sides of the toothed seg ments and serving to releasably securethe dog 35 in position ad]acent a desired set of teeth Referring toFigure 1, the power shaft 12 is mounted within a split bearing member atthe rear of the press comprising a lower thrust bearing 47 and a cap 48secured to the lower bearing by bolts 49. The cap and lower hearing arejoined at an angle to the horizontal, so that the lower thrust bearingmay receive allthe thrust and so that no thrust is imparted to the capmember. The press bed 11 has the usual catch 50, pivotally mounted on astandard 51 at the topthereof, with the usual screw 52 contacting thepress 11.

The improved construction permits a ready removal of the shafts wheneverthey are broken or damaged in any way, expedites the time necessary forreplacing the press in active service, and reduces the expense, as thecost ofreplacing the broken part is proportionately less. In addition,the split bearing for the power shaft permits ready removal of the powershaft without dismantling the rear of the press.

Vhile I have described specific embodiments of the novelimp-rovements,,it is obvious that changesrin structure and arrangementtofit other types of presses may readily be made, withinthe scope of theinvention as defined in the appended claims.

Having thus described my invention, I

claim;

1. Inv a press, a platen casting, a recess having right-angularlypositioned sides therein, a rectangular steel shaft formed to snugly fitin said recess and having cylindricalzend portions, and bolts removablylocking said steel shaft in said recess.

2. In a press, a platen casting, a. recess having right angularlypositioned; sidestherein, a: rectangular steel shaft formed to snuglyfit in said recess, bolts removably locking said steel shaft-,insaidrecess, cylindrical, draw pins at each end OfSZllCl shaft, a; movableeccentric mounted on each draw pin,

platen bars mounted onsaid eccentrics, and means guiding said casting toturn about av moving center.

In testimony, whereof I affix my signature.

FREDERICK M. GREEN.

